Stock identity of elasmobranchs in the Northeast Atlantic in relation to assessment and management
Fish stock assessment requires that those parts of a species ' range can be identified in which the effects of exploitation in particular fisheries are apparent. Thus, fisheries are monitored and regulated in management units largely determined by the distribution of fisheries, areas which may...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.570.3972 2023-05-15T17:41:16+02:00 Stock identity of elasmobranchs in the Northeast Atlantic in relation to assessment and management M. G. Pawson J. R. Ellis The Pennsylvania State University CiteSeerX Archives 2005 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.570.3972 http://journal.nafo.int/35/pawson/38-pawson.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.570.3972 http://journal.nafo.int/35/pawson/38-pawson.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://journal.nafo.int/35/pawson/38-pawson.pdf Key words assessment elasmobranchs management units NE Atlantic stock identity text 2005 ftciteseerx 2016-01-08T12:30:04Z Fish stock assessment requires that those parts of a species ' range can be identified in which the effects of exploitation in particular fisheries are apparent. Thus, fisheries are monitored and regulated in management units largely determined by the distribution of fisheries, areas which may or may not coincide with biological self-perpetuating units. There are several methods of identifying fish stocks, including the interpretation of distribution and relative abundance, tagging studies, genetic analyses and spatial variation in morphometrics, life-history parameters, parasites and contaminants. The natural variability and difficulty in measuring life history and morphological characteristics at the population level suggest that these are not good indicators of stock separation for elasmobranchs. Information on population demography does, however, reveal the relationships between fisheries and resource, and indicates where sampling programmes for the collection of stock assessment data should take place. Tagging studies, in particular, can indicate a stock's main range and migrations, if linked with a good description of the fisheries that are involved with its exploitation. The environmental param-eters associated with the distribution of a species are also a useful guide to the likely boundaries of movement. In this paper, we discuss the utility of these approaches to delineate areas to be used for stock assessments of elasmobranchs, and show how biological and fishery information has been used to describe the stock identity for six case study species in the Northeast Atlantic. Text Northeast Atlantic Unknown |
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English |
topic |
Key words assessment elasmobranchs management units NE Atlantic stock identity |
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Key words assessment elasmobranchs management units NE Atlantic stock identity M. G. Pawson J. R. Ellis Stock identity of elasmobranchs in the Northeast Atlantic in relation to assessment and management |
topic_facet |
Key words assessment elasmobranchs management units NE Atlantic stock identity |
description |
Fish stock assessment requires that those parts of a species ' range can be identified in which the effects of exploitation in particular fisheries are apparent. Thus, fisheries are monitored and regulated in management units largely determined by the distribution of fisheries, areas which may or may not coincide with biological self-perpetuating units. There are several methods of identifying fish stocks, including the interpretation of distribution and relative abundance, tagging studies, genetic analyses and spatial variation in morphometrics, life-history parameters, parasites and contaminants. The natural variability and difficulty in measuring life history and morphological characteristics at the population level suggest that these are not good indicators of stock separation for elasmobranchs. Information on population demography does, however, reveal the relationships between fisheries and resource, and indicates where sampling programmes for the collection of stock assessment data should take place. Tagging studies, in particular, can indicate a stock's main range and migrations, if linked with a good description of the fisheries that are involved with its exploitation. The environmental param-eters associated with the distribution of a species are also a useful guide to the likely boundaries of movement. In this paper, we discuss the utility of these approaches to delineate areas to be used for stock assessments of elasmobranchs, and show how biological and fishery information has been used to describe the stock identity for six case study species in the Northeast Atlantic. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
M. G. Pawson J. R. Ellis |
author_facet |
M. G. Pawson J. R. Ellis |
author_sort |
M. G. Pawson |
title |
Stock identity of elasmobranchs in the Northeast Atlantic in relation to assessment and management |
title_short |
Stock identity of elasmobranchs in the Northeast Atlantic in relation to assessment and management |
title_full |
Stock identity of elasmobranchs in the Northeast Atlantic in relation to assessment and management |
title_fullStr |
Stock identity of elasmobranchs in the Northeast Atlantic in relation to assessment and management |
title_full_unstemmed |
Stock identity of elasmobranchs in the Northeast Atlantic in relation to assessment and management |
title_sort |
stock identity of elasmobranchs in the northeast atlantic in relation to assessment and management |
publishDate |
2005 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.570.3972 http://journal.nafo.int/35/pawson/38-pawson.pdf |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
http://journal.nafo.int/35/pawson/38-pawson.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.570.3972 http://journal.nafo.int/35/pawson/38-pawson.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766142735908077568 |